Hi everyone
I’m trying to get into home automation and I have the general idea that Wifi shouldn’t be used, Zwave should be used for important devices and that Zigbee should be used for the rest
However, I do not understand what type of switches I should be looking for.
I have this 3 gang electrical box with 2 current dumb modules (are they named modules?) installed, a light switch and a light switch + dimmer. I have checked and I have neutral in that box.

Do I need to look for a 2 gang dimmer switch and just not use the dimming functionality for the bulb which is not capable of dimming? Should I get 2 seperate 1 gang modules? One for light & one for dimming? And if so, can the same neutral be used for both modules?

Here are two pictures of my current switch
https://i.imgur.com/nKrxJgG.jpg
https://i.imgur.com/dl4VLjU.jpg
Sorry for the extremely noob and possibly stupid questions but I’m just really confused and would rather confirm than spend money on the wrong products